Set includes both SAE and Metric sizes. SAE sizes included: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16 and 3/8 inch. Metric sizes included: 1.27, 1.5, 2, 2.5, 3, 4, 4.5, 5, 5.5, 6, 7, 8 and 10 mm. Constructed from heat treated carbon steel with black oxide finish. Pivot style holder release feature allows for removal of any key without interference of adjacent keys Product Features:Set includes both SAE and Metric sizesSAE sizes included: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 3/16, 7/32, 1/4, 5/16 and 3/8 inchMetric sizes included: 1.27, 1.5, 2, 2.5, 3, 4, 4.5, 5, 5.5, 6, 7, 8 and 10 mmConstructed from heat treated carbon steel with black oxide finishPivot style holder release feature allows for removal of any key without interference of adjacent keys